Finding the Fourth Proportional to 1,560.81, 2,153.82 and 852.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,560.81 : 2,153.82 = 852.51 : x
2. Step 2: Convert to fraction form
   1,560.81/2,153.82 = 852.51/x
3. Step 3: Cross multiply
   1,560.81x = 2,153.82 × 852.51
4. Step 4: Simplify right side
   1,560.81x = 1,836,150.40
5. Step 5: Solve for x
   x = 1,836,150.40/1,560.81
6. Step 6: Final answer
   x = 1,176.41